Today, Microsoft released an update to the Backwards Compatibility List, which adds 38 games to the Xbox 360. This brings the total Xbox games that work on the 360 to around 300.
The list includes:
Tenku (Japan only)
Avatar: The Last Airbender
Avatar: The Legend of Aang (EMEA/ANZ)
Breakdown
Call of Duty 2: Big Red One
Call of Duty 3
Cars
Crash Bandicoot 5: Wrath of Cortex
Daisenryaku VII
FIFA Soccer 2007
Full Spectrum Warrior
Guilty Gear Isuka
Innocent Tears (Japan only)
Jet Set Radio Future
King of Fighters 2002
King of Fighters: Neowave
Mad Dash Racing (Japan only)
Mech Assault 2
Mercenaries: Playground of Destruction
Nascar 2006: Total Team Control
NFL Fever 2004
Oddworld Munch’s Oddysee
Panzer Dragoon Orta
Petit Copter (Japan only)
Phantom Dust
Reservoir Dogs
Return To Castle Wolfenstein
Rugby League 2
Sengoku Warriors (Japan only)
Sonic Riders
Soul Calibur 2 UPDATED
Spider-Man 2
Star Wars: Republic Commando
Street Fighter Anniversary Collection
Tiger Woods PGA Tour 07
Tony Hawk’s Underground
Ultra Bust a Move /ULTRA Pazzle Bobble
Unreal Championship 2
The download is currently on Xbox Live, but you can also download the ISO from Microsoft. All you have to do is click here.